But what's most innovative about the app is that it lets you factor sustainability into your decisions about which resorts to patronize. The app displays what individual ski resorts are doing for renewable energy, transportation, waste reduction, and environmental education. The app also highlights resorts that have received a CLIF BAR Golden Eagle Award, which is given annually to ski resorts for exceptional environmental achievement.
The SOS app is one of dozens of iPhone applications that help users reduce their environmental impact. Some of the most prominent ones include greenMETER , the Carbon Tracker , and now the Locavore  app. SOS has one key advantage, though--it's free.
[Via CLIF BAR ]
Related: The 10 Greenest Ski Resorts